New speices may be fromed if

Options

A. (i) and (ii)
B. (i) and (iii)
C. (ii), (iii) and (iv)
D. (i),(ii) and (iii)

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks under what conditions new species may be formed. This involves understanding the processes of evolution and speciation.

2. **Analyzing the Options**:
- **Option 1**: DNA undergoes significant changes in the germ cell.
- Explanation: Changes in DNA can lead to mutations, which are a primary driver of evolution and can result in the formation of new species.

- **Option 2**: The chromosome number changes in the gamete.
- Explanation: Changes in chromosome number can lead to reproductive isolation and thus contribute to the development of new species.

- **Option 3**: There is no change in the genetic material.
- Explanation: If there is no change in genetic material, then the offspring will be identical to the parent, and no new species can arise.

- **Option 4**: Mating does not take place.
- Explanation: Mating is essential for sexual reproduction. Without mating, there can be no genetic variation or formation of new species.

3. **Identifying the Correct Options**:
- The first two options (DNA changes and chromosome number changes) are conditions that can lead to the formation of new species.
- The last two options (no change in genetic material and no mating) cannot lead to the formation of new species.

4. **Conclusion**: Based on the analysis, the correct answer is that new species may be formed if DNA undergoes significant changes in the germ cell or if the chromosome number changes in the gamete. Therefore, the correct option is **Option A**.

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